Again, seems like a company issue more than anything else, because the broader data does not support this.
Even your link doesn't really support your arguments, and excuse any errors via Google Translate -
With the other side being -Available assessments of the effects of telework on productivity lead to mixed results. By way of illustration, Bloom et al. (2015) study the transition to teleworking of a set of volunteer employees of a Chinese call center, in a company equipped and prepared for this mode of organization. The authors find that teleworkers are significantly more productive – with productivity gains of around 20% – happier and less likely to leave the company (although they are also less likely to be promoted to comparable performance).
But let's look at the final line -On the other hand, Morikawa (2020) considers the experience of a Japanese research institute that, suddenly and without preparation, switched to teleworking during the period of confinement. Productivity would then have fallen by about 40% on average.
So yeah, when you just randomly shift to remote work without any planning or prep, you're going to see problems. But even the study largely argues what telework is overall beneficial as long as it can be adequately planned for.the effects of telework on productivity will be all the more positive and important as this form of work attracts both the support of the workers concerned and that of management, that all actors are prepared and trained in this mode of organization, and that the equipment and the working environment at home are appropriate.
Worth noting: This study uses older data from pre-covid times, and is from last year. We've got a lot more data from covid-times that, as I linked, shows a general positive impact in terms of productivity even over multiple years.The transition to teleworking during the 2020 lockdowns was generally carried out under unfavourable conditions, limiting the possible positive effects on productivity.
Just because your company is struggling doesn't mean it's reflective of any company. I'm gonna try to avoid nation bashing here, but I've spent many years working with French partners and colleagues, and even in pre-pandemic times when we were all full-time in the office on both sides of the pond, the French teams I've worked with have literally never been remotely impressive in terms of their productivity compared to teams based elsewhere. Is it just a string of bad luck? Quite likely, but if I'm using the same anecdotal experience you are for a broad generalization, it's not exactly a positive for the French work culture. But I'm not actually making that generalization, because it's overly broad and not really useful as anything more than an anecdote about my personal experience.